I feel like you may have made an incorrect assumption when deciding which were the right words. Question all your assumptions.
Beautiful Butts Might Burst = 1 correct Beautiful Butts Man Butts = 2 correct First word is "Beautiful", 4th is "Butts"= Not entirely true. So "Butts" is neither the 2nd nor 4th word?
Argh you're so close to unlocking one of the great secrets of these initials. All words I've counted as correct since the start have been in the correct place, if that helps.